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Revenue from Contracts with Customers - Schedule of Contracts In Progress (Details) - USD ($) $ in Thousands | Jun. 30, 2026 | Dec. 31, 2025
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Revenue from Contract with Customer [Abstract] |  |
Revenue earned on uncompleted contracts | $ 677,744 | $ 614,448
Less: Billings to date | (685,240) | (606,083)
Net (overbilling) underbilling | (7,496) | 8,365
Costs and estimated earnings in excess of billings on uncompleted contracts | 27,399 | 29,254
Billings in excess of costs and estimated earnings on uncompleted contracts, net | $ (34,895) | $ (20,889)

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- Definition Billings In Excess Of Billings And Estimated Earnings On Uncompleted Contracts + References No definition available. + Details
Name: | lmb_BillingsInExcessOfBillingsAndEstimatedEarningsOnUncompletedContracts
Namespace Prefix: | lmb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition The amount of billings that were raised on the contracts to date during the period. + References No definition available. + Details
Name: | lmb_BillingsToDateOnContracts
Namespace Prefix: | lmb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Costs In Excess Of Billings And Estimated Earnings On Uncompleted Contracts + References No definition available. + Details
Name: | lmb_CostsInExcessOfBillingsAndEstimatedEarningsOnUncompletedContracts
Namespace Prefix: | lmb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition The amount of Asset or liability for net Under Over billings on the contracts. + References No definition available. + Details
Name: | lmb_NetUnderOverBillingOnContracts
Namespace Prefix: | lmb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition The amount of revenue earned from uncompleted contracts during the period. + References No definition available. + Details
Name: | lmb_RevenueEarnedOnUncompletedContracts
Namespace Prefix: | lmb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- References No definition available. + Details
Name: | us-gaap_RevenueFromContractWithCustomerAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration